13.Library Management SystemOOPs.py

# Write a "Library" class with no_of_books(int) and books(list) as two instance variables.

# Make a method that checks whether the no_of_books== books(len)
# Write a program to create a library from Library class and show how you can print all books, add a book and get the number of books using different methods.
# Show that your program dosent persist the books after the program is stopped

class Library:

    def __init__(self, no_of_books, books):
        self.no_of_books = no_of_books
        self.books = books

    def check(self):
        # Check whether the number of books matches the length of the books list
        if self.no_of_books == len(self.books):
            print("Number of books matches the length of the books list.")
        else:
            print("Number of books does not match the length of the books list.")

    def print_all_books(self):
        # Print all books in the library
        print("Books in the library:")
        for book in self.books:
            print(book)

    def add_book(self, new_book):
        # Add a new book to the library
        self.books.append(new_book)
        self.no_of_books += 1
        print(f"Added '{new_book}' to the library.")

    def get_number_of_books(self):
        # Return the number of books in the library
        print(f"There are now {self.no_of_books} books in the library.")


# Example usage:
# Provide the initial number of books and a list of books when creating an instance
library_instance = Library(3, ['The Psychology of Money', 'The Richest man in Babylon', 'Think and Grow Rich'])

# Call the check method to verify the initial state
library_instance.check()

# Call the print_all_books method to display all books in the library
library_instance.print_all_books()

# Call the add_book method to add a new book to the library
library_instance.add_book('The Power of your Subconcious Mind')

# Call the get_number_of_books method to get the updated number of books
library_instance.get_number_of_books()

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